Sintesis dan karakterisasi katalis mangan ortofosfat dan mangan pirofosfat serta rute reaksinya pada katalisis selulosa menjadi 5-hidroksimetil furfural (5-HMF)

Jovita, Stella (2022) Sintesis dan karakterisasi katalis mangan ortofosfat dan mangan pirofosfat serta rute reaksinya pada katalisis selulosa menjadi 5-hidroksimetil furfural (5-HMF). Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pada penelitian ini katalis mangan ortofosfat dan pirofosfat telah disintesis melalui metode presispitasi pada suhu ruang. Endapan yang diperoleh selanjutnya dikalsinasi dengan variasi suhu kalsinasi 350, 600, and 800 °C. Padatan hasil sintesis dikarakterisasi dengan XRD, spektroskopi Fourier Transform Infrared (FTIR), adsorpsi piridin-FTIR, adsorpsi-desorpsi nitrogen (N2), Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). Hasil karakterisasi menunjukkan terbentuknya katalis mangan ortofosfat dan pirofosfat yang memiliki fasa amorf pada suhu kalsinasi 350 °C dan fasa kristal monoklinik pada kalsinasi 600 dan 800 °C. Kedua jenis katalis hasil sintesis memiliki sisi asam Lewis dan Brønsted. Sisi asam Brønsted tertinggi diperoleh pada katalis mangan pirofosfat dengan suhu kalsinasi 350°C. Luas permukaan katalis mangan ortofosfat dan pirofosfat pada suhu kalsinasi 350°C masing-masing sebesar 13,727 dan 5,861 m2/g. Hasil SEM menunjukkan bahwa katalis mangan ortofosfat memiliki morfologi flakes dan ellipsoid masing-masing pada suhu kalsinasi 350 dan 800°C, sedangkan pada katalis mangan pirofosfat memiliki morfologi plates berpori dan plates pada suhu kalsinasi 350 dan 800°C. Kinerja katalis hasil sintesis diuji melalui reaksi pembentukan 5-HMF dari reaktan awal selulosa, glukosa, dan fruktosa. Hasil uji katalisis menunjukkan bahwa yield 5-HMF tertinggi diperoleh dengan bantuan katalis mangan pirofosfat pada suhu kalsinasi 350°C yaitu sebesar 25,77% dari reaktan awal selulosa, 50,87% dari reaktan awal glukosa, dan 80,19% dari reaktan awal fruktosa. Pembentukan 5-HMF dipengaruhi oleh keasaman katalis terutama asam Brønsted.
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In this research, the manganese orthophosphate (Mn3(PO4)2) and pyrophosphate (Mn2P2O7) catalyst were successfully synthesized by a simple, fast, and cost-effective precipitation method at room temperature. The precipitates obtained were calcined at various temperatures (350, 600, and 800 °C) and the resulted were characterized by powder X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectroscopy, pyridine adsorption-FTIR, N2 adsorption-desorption and Scanning Electron Microscopy-Energy Dispersive X-Ray (SEM-EDX). The characterization results showed the formation of amorphous manganese orthphosphate and pyrophosphate phase at 350 °C and a monoclinic crystalline phase at 600 and 800 °C. Both types of synthesized catalysts have Lewis and Brønsted acid sites. The highest Brønsted acid site of the manganese pyrophosphate catalyst (350°C). The surface area of the manganese orthophosphate and pyrophosphate catalysts at calcination temperature of 350°C were 13,727 and 5,861 m2/g, respectively. The SEM results showed that the manganese orthophosphate catalyst had flakrs and ellipsoid morphology at calcination temperatures of 350 and 800°C, respectively, while manganese pyrophosphate had the morphology of porous plate and plate at calcination temperatures of 350 and 800°C. The catalytic test of all manganese orthophosphate and pyrophosphate catalysts was carried out in the formation reaction of 5-HMF. The results of the catalysis test showed that the highest yield % of 5-HMF obtained from manganese pyrophosphate (350 °C) catalyst, which are 25,77% from cellulose, 50,87% from glucose, and 80, 19% from fructose reactant. The formation of 5-HMF is influenced by the acidity of the catalyst, especially Brønsted acid.

Item Type:	Thesis (Masters)
Additional Information:	RTKi 541.395 Jov s-1 2022
Uncontrolled Keywords:	Selulosa, 5-Hidroksimetilfurfural (HMF), katalis heterogen, mangan ortofosfat, mangan pirofosfat, presipitasi, Cellulose, 5-Hydroxymethylfurfural (HMF), heterogeneous catalyst, manganese orthophosphate, manganese pyrophosphate, precipitation
Subjects:	Q Science > QD Chemistry > QD501 Catalysis. Catalysts.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	30 Apr 2026 06:23
Last Modified:	30 Apr 2026 06:23
URI:	http://repository.its.ac.id/id/eprint/132946

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